        html,
    body,
    div,
    span,
    h1,
    a,
    ul,
    li,
    nav {
        margin: 0;
        padding: 0;
        border: 0;
        font-size: 100%;
        font: inherit;
        vertical-align: baseline;
    }
    
    body {
        line-height: 1em;
        #行高 background: #f4f4f4;
        font-family: Arial, sans-serif;
        font-size: 14px;
        font-weight: lighter;
    }
    
    .l-main {
        width: 530px;
        margin: 0 auto;
    }
    
    .menu {
        width: 250px;
        margin: 40px;
        background: #ffffff;
        box-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
        border-radius: 5px;
        float: left;